451001215556540 has 96 divisors (see below), whose sum is σ = 1057258018865664. Its totient is φ = 160182347592960.

The previous prime is 451001215556509. The next prime is 451001215556641. The reversal of 451001215556540 is 45655512100154.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 451001215556491 and 451001215556500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 378628382 + ... + 379817658.

It is an arithmetic number, because the mean of its divisors is an integer number (11013104363184).

Almost surely, 2^{451001215556540} is an apocalyptic number.

It is an amenable number.

451001215556540 is an abundant number, since it is smaller than the sum of its proper divisors (606256803309124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

451001215556540 is a wasteful number, since it uses less digits than its factorization.

451001215556540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229427 (or 1229425 counting only the distinct ones).

The product of its (nonzero) digits is 600000, while the sum is 44.

Adding to 451001215556540 its reverse (45655512100154), we get a palindrome (496656727656694).

The spelling of 451001215556540 in words is "four hundred fifty-one trillion, one billion, two hundred fifteen million, five hundred fifty-six thousand, five hundred forty".